Answer by David N. ·
When I look at the upgrade guide for DCRUM they have a list of the order to upgrade each component in DCRUM. I have listed the relevant steps below. My suggestion would be to reverse that order while you shutdown DCRUM (replacing upgrade with shutdown/start as needed).
Uninstalling DCRUM 12.4 2 Answers
Rules for 3 F5's - 3 Tiers - SNAT/NAT 4 Answers
DCRUM 12.4 New Instance Setup 2 Answers